Biology Forums - Study Force

If an unfair coin has a 40 chance of landing heads up, what is the probability of it landing tails up?
  1.60
  2.50
  3.40
  4.It depends on the previous roll.

Q. 2

A die is rolled and the following events are defined:
   A = the event that the roll of the die is an even number
   B = the event that the roll of the die is a number less than 4
   C = the event that the roll of the die is a number less than 2
   D = the event that the roll of the die is an odd number
   Which of the following events are mutually exclusive?

  1.A and B
  2.B and C
  3.C and D
  4.A and C

Q. 3

A box contains marbles of 2 colors. There are 2 red and 3 yellow. Two marbles are selected without replacement. Draw the tree diagram and label the probabilities on each branch. What is the probability of getting a marble of each color?
  1.3/10
  2.2/5
  3.1/2
  4.3/5

Q. 4

A box contains marbles of 2 colors. There are 2 red and 3 yellow. Two marbles are selected without replacement. Draw the tree diagram and label the probabilities on each branch. What is the probability that the second is yellow if the first is yellow?
  1.3/5
  2.2/5
  3.1/2
  4.3/10

Q. 5

A box contains marbles of 2 colors. There are 2 red and 3 yellow. Two marbles are selected without replacement. Draw the tree diagram and label the probabilities on each branch. What is the probability that the second marble picked is red if the first is yellow?
  1.3/10
  2.1/2
  3.2/5
  4.3/5

Q. 6

A box contains marbles of 2 colors. There are 2 red and 3 yellow. Two marbles are selected without replacement. Draw the tree diagram and label the probabilities on each branch. What is the probability of both marbles being yellow?
  1.3/10
  2.1/4
  3.1/2
  4.3/5

Q. 7

A box contains marbles of 2 colors. There are 2 red and 3 yellow. Two marbles are selected without replacement. Draw the tree diagram and label the probabilities on each branch. What is the probability of both marbles being red?
  1.1/10
  2.1/4
  3.1/2
  4.3/20

Q. 8

A die is rolled and the following events are defined:
   A = the event that the roll of the die is an even number
   B = the event that the roll of the die is a number less than 4
   C = the event that the roll of the die is a number less than 2
   D = the event that the roll of the die is an odd number

  What is P(A or B)?
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  1.1
  2.5/6
  3.1/9
  4.1/3

Q. 9

A die is rolled and the following events are defined:
   A = the event that the roll of the die is an even number
   B = the event that the roll of the die is a number less than 4
   C = the event that the roll of the die is a number less than 2
   D = the event that the roll of the die is an odd number
   Which of the following events are complementary?

  1.A and B
  2.A and D
  3.B and D
  4.None of them are complementary.

Answer to #1

1

Answer to #2

4

Answer to #3

4

Answer to #4

3

Answer to #5

2

Answer to #6

1

Answer to #7

1

Answer to #8

2

Answer to #9

2